/*
 * Copyright (C) 2005 Luca Veltri - University of Parma - Italy
 * 
 * This file is part of MjSip (http://www.mjsip.org)
 * 
 * MjSip is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * MjSip is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with MjSip; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Author(s):
 * Luca Veltri (luca.veltri@unipr.it)
 */

package org.zoolu.net;


//import java.net.InetAddress;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;


/** TcpSocket provides a uniform interface to TCP transport protocol,
  * regardless J2SE or J2ME is used.
  */
public class TcpSocket {
	
	/** Socket */
	Socket socket;



	/** Creates a new TcpSocket */ 
	TcpSocket() {
		socket=null;
	}

	/** Creates a new TcpSocket */ 
	TcpSocket(Socket sock) {
		socket=sock;
	}

	/** Creates a new TcpSocket */ 
	public TcpSocket(String host, int port) throws java.io.IOException {
		socket=new Socket(host,port);
	}

	/** Creates a new TcpSocket */ 
	public TcpSocket(String host, int port, IpAddress local_ipaddr, int local_port) throws java.io.IOException {
		socket=new Socket(host,port,local_ipaddr.getInetAddress(),local_port);
	}

	/** Creates a new TcpSocket */ 
	public TcpSocket(IpAddress ipaddr, int port) throws java.io.IOException {
		socket=new Socket(ipaddr.getInetAddress(),port);
	}

	/** Creates a new TcpSocket */ 
	public TcpSocket(IpAddress ipaddr, int port, IpAddress local_ipaddr, int local_port) throws java.io.IOException {
		socket=new Socket(ipaddr.getInetAddress(),port,local_ipaddr.getInetAddress(),local_port);
	}

	/** Whether the socket is connected. */
	public boolean isConnected() {
		/*try {
			// if java4 VM (e.g. jdk1.4) or later, use Socket's method 'isConnected()'
			return ((Boolean)Class.forName("Socket").getMethod("isConnected",null).invoke(socket,null)).booleanValue(); 
		}
		catch (java.lang.ClassNotFoundException e) {}
		catch (Exception e) {}
		*/ // else
		try  {
			return socket.getInputStream()!=null;
		}
		catch (Exception e) {}
		// else
		return false;
	}
	
	/** Closes this socket. */
	public void close() throws java.io.IOException {
		socket.close();
	}
	
	/** Gets the address to which the socket is connected. */
	public IpAddress getAddress() {
		return new IpAddress(socket.getInetAddress());
	}
	
	/** Gets an input stream for this socket. */
	public InputStream getInputStream() throws java.io.IOException {
		return socket.getInputStream();
	}
	
	/** Gets the local address to which the socket is bound. */
	public IpAddress getLocalAddress() {
		return new IpAddress(socket.getLocalAddress());
	}
	
	/** Gets the local port to which this socket is bound. */
	public int getLocalPort() {
		return socket.getLocalPort();
	}
	
	/** Gets an output stream for this socket. */
	public OutputStream getOutputStream() throws java.io.IOException {
		return socket.getOutputStream();
	}
	
	/** Gets the remote port to which this socket is connected. */
	public int getPort() {
		return socket.getPort();
	}
	
	/** Gets the socket timeout. */
	public int getSoTimeout() throws java.net.SocketException {
		return socket.getSoTimeout();
	}
	
	/** Enables/disables the socket timeout, in milliseconds. */
	public void setSoTimeout(int timeout)  throws java.net.SocketException {
		socket.setSoTimeout(timeout);
	}
	
	/** Converts this object to a String. */
	@Override
	public String toString() {
		return socket.toString();
	}

}
